Excessive Heat Warning — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 9:00 PM Excessive Heat Watch 7:00 PM

Montgomery County, Illinois, United States

Last updated: 8:57 AM CDT  ·  Refresh
26°C
Feels like 30°
Fog
▲ 34°  /  ▼ 22°
Wind
4 mph S
Humidity
93%
Dew Point
24°
Pressure
29.27 inHg
Visibility
0 mi
UV Index
4.4
Cloud Cover
77%
Sunrise
5:53 AM
Sunset
8:15 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Montgomery County is currently fog at 25°C. Precipitation is likely — peak probability 67% around 5 PM. Atmospheric instability is elevated (CAPE up to 4428 J/kg) — isolated convective development possible. Sunrise: 5:53AM · Sunset: 8:15PM.

Alerts

Excessive Heat Warning
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 9:00 PM
Excessive Heat Watch
Expires 7:00 PM
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
46%
9 AM
27°
47%
10 AM
29°
48%
11 AM
30°
32%
12 PM
32°
24%
1 PM
34°
30%
2 PM
34°
40%
3 PM
34°
40%
4 PM
33°
62%
5 PM
32°
66%
6 PM
31°
62%
7 PM
29°
58%
8 PM
28°
52%
9 PM
26°
34%
10 PM
25°
23%
11 PM
24°
14%
12 AM
24°
5%
1 AM
24°
5%
2 AM
23°
5%
3 AM
23°
5%
4 AM
23°
5%
5 AM
22°
5%
6 AM
23°
5%
7 AM
23°
5%
7-Day Forecast
Today
34° 22°
Mostly Cloudy with a 66% chance of rain.
Mon
34° 22°
Partly Cloudy with a 36% chance of rain.
Tue
32° 18°
Partly Cloudy with a 20% chance of rain.
Wed
29° 17°
Mostly Clear.
Thu
30° 17°
Clear.
Fri
26° 18°
Drizzle, 59% chance.
Sat
29° 17°
Drizzle, 53% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Fog 46% 4 mph S 93%
9 AM 27° Rain 47% 5 mph S 89%
10 AM 29° Mostly Cloudy 48% 5 mph SSW 83%
11 AM 30° Partly Cloudy 32% 5 mph SSW 78%
12 PM 32° Mostly Clear 24% 6 mph SW 72%
1 PM 34° Partly Cloudy 30% 6 mph SW 69%
2 PM 34° Mostly Cloudy 40% 5 mph WSW 66%
3 PM 34° Partly Cloudy 40% 6 mph WSW 64%
4 PM 33° Mostly Cloudy 62% 6 mph SW 68%
5 PM 32° Mostly Cloudy 66% 6 mph SSW 74%
6 PM 31° Mostly Cloudy 62% 8 mph SSW 82%
7 PM 29° Mostly Cloudy 58% 7 mph SSW 84%
8 PM 28° Partly Cloudy 52% 8 mph SW 85%
9 PM 26° Mostly Clear 34% 10 mph SSW 87%
10 PM 25° Partly Cloudy 23% 8 mph SSW 88%
11 PM 24° Partly Cloudy 14% 6 mph SSW 88%
12 AM 24° Partly Cloudy 5% 6 mph SSW 88%
1 AM 24° Partly Cloudy 5% 6 mph S 90%
2 AM 23° Mostly Cloudy 5% 6 mph S 92%
3 AM 23° Mostly Cloudy 5% 6 mph S 93%
4 AM 23° Mostly Cloudy 5% 6 mph SSE 92%
5 AM 22° Partly Cloudy 5% 6 mph SSE 91%
6 AM 23° Partly Cloudy 5% 6 mph SSE 90%
7 AM 23° Partly Cloudy 5% 7 mph SSE 88%
15-Day Forecast
Today
7/26
Mostly Cloudy
66%
22°
34°
Mon
7/27
Partly Cloudy
36%
22°
34°
Tue
7/28
Partly Cloudy
20%
18°
32°
Wed
7/29
Mostly Clear
7%
17°
29°
Thu
7/30
Clear
16%
17°
30°
Fri
7/31
Drizzle
59%
18°
26°
Sat
8/1
Drizzle
53%
17°
29°
Sun
8/2
Drizzle
43%
18°
29°
Mon
8/3
Drizzle
44%
18°
31°
Tue
8/4
Drizzle
51%
20°
32°
Wed
8/5
Drizzle
60%
20°
32°
Thu
8/6
Drizzle
60%
19°
31°
Fri
8/7
Drizzle
60%
19°
31°
Sat
8/8
Drizzle
60%
19°
32°
Sun
8/9
Drizzle
60%
20°
32°
55
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
55 AQI 11.4 µg/m³
O3
Ground-level ozone
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 55 Moderate 36 55
Tue 55 Moderate 45 55
Wed 49 Good 42 49
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sun Jul 26, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2318 J/kg
MLCAPE3003 J/kg
MUCAPE3443 J/kg
SBCIN-131 J/kg
MLCIN0 J/kg
Lifted Index-4.4
Kinematics
0–6 km Shear20 kt
0–1 km Shear17 kt
Eff. Shear28 kt
0–1 km SRH-27
0–3 km SRH-64
Eff. SRH-64
Storm Motion296° @ 23 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.7
Thermo & Levels
PWAT1.85 in
0–3 km LR4.5 °C/km
700–500 LR6.0 °C/km
Total Totals47.3
LCL978 hPa
LFC719 hPa
EL169 hPa
Freezing Lvl16,385 ft